Identity Stronghold makes that sleeve that ships with the passport card. See this news article http://www.idstronghold.com/content/identity-strongholds-secure-sleeve-protect-us-passport-card They also have a passport book size sleeve on their website as well as badge holders.

The US Passport Card and the Washington State enhanced drivers license are shipping with the Identity Stronghold Secure Sleeve. BC should do the same. While in this sleeve no one can read the RFID chip contained within. You can buy them at their website too if you wish. http://www.idstronghold.com/.